<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(imgObj,index) in imgList" :key="imgObj.id" >
        <img :src="imgObj.imgUrl" @click="changeCurrentIndex(index)" :class="{active:currentIndex==index}">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

  import Swiper from 'swiper'


  
  import "swiper/css/swiper.css";
  export default {
    name: "ImageList",
    props:['imgList'],
    data() {
      return {
        currentIndex:0
      }
    },
    watch:{
      imgList:{
        handler(newValue, oldValue){
             this.$nextTick(()=>{
             new Swiper ('.swiper-container', {              
              // 如果需要前进后退按钮
              navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
              },
              //显示轮播图 同时显示的数量
              slidesPerView :4,
              //每一次切换图片的个数  默认是1
              slidesPerGroup : 1,
            })        
        })
        }
      }
    },
    methods: {
      changeCurrentIndex(index){
        this.currentIndex = index
        //把点击轮播的图片传给zoom组件 
        //只要点击轮播的图片  对应的zoom组件也能展示
        this.$bus.$emit('getIndex', this.currentIndex)
      },
      
      
    },
    
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        // &:hover {
        //   border: 2px solid #f60;
        //   padding: 1px;
        // }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>